BMFT 651: Sexual TherapyFebruary 2, 2010

Agenda

✤ Female sexual anatomy (8:00-9:15)

✤ Break (9:15-9:30)

✤ Male sexual anatomy (9:30-10:30)

✤ Anatomy videos(10:30-10:50)

Female Sexual Anatomy

The Vulva

✤ Mons veneris - mound of fatty tissue over the pubic bone

✤ Labia majora - outer lips

✤ Labia minora - inner lips

✤ Clitoris - highly sensitive; only function is sexual pleasure

✤ External shaft & glans

✤ Internal crura & clitoral hood

The Vulva

✤ Vestibule - area of vulva inside labia minora

✤ Urethral opening

✤ Introitus - opening to vagina

✤ Hymen - tissue that partially covers vaginal opening

✤ Perineum - area between anus & vagina

The Vulva

The Vagina

✤ Stretchable canal that opens at the vulva & extends about 4” into pelvis

✤ Kegel exercises

✤ Grafenberg (G) spot - located at front wall of vagina

✤ Vaginal lubrication

✤ Enhances possibility of conception

✤ Increases sexual enjoyment

✤ Vaginal secretions

✤ Sign of vaginal health

✤ Frequent douching alters chemical balance

Other Internal Structures

✤ Cervix - small end of uterus, located at back of vagina

✤ Uterus - pear-shaped organ inside pelvis within which fetus develops

✤ Perineum - external layer

✤ Myometrium - middle layer

✤ Endometrium - tissue that lines inside of uterine walls

Other Internal Structures

✤ Fallopian tubes - tubes in which egg & sperm travel, extending from sides of uterus

✤ Egg travels 1” every 24 hours & remains viable for fertilization for 24-48 hours

✤ Ectopic pregnancy - when a fertilized ovum implants outside the uterus, most commonly in the fallopian tube

✤ Ovaries - female gonads that produce ovum & sex hormones

Internal Female Sexual Anatomy

Breasts

✤ Internal

✤ Mammary glands produce milk

✤ Fatty tissue determines size

✤ External

✤ Areola - darker area; contains oil-secreting glands

✤ Nipple - in center of areola & has 12-15 openings for milk

Break9:00-9:15

Male Sexual Anatomy

Penis

✤ Foreskin, glans, shaft, & root

✤ Nerves, blood vessels, & fibrous tissue

✤ Glans - has most nerve endings

✤ Rim or crown is especially sensitive as is the frenulum

✤ Three parallel cylinders

✤ Two large cavernous bodies

✤ One smaller spongy body

✤ Kegel exercises

✤ Stronger & more pleasurable orgasms

✤ Better ejaculatory control

✤ Increased pelvic sensation during sexual arousal

The Penis

The Scrotum

✤ Sac or pouch with two chambers - each chamber contains one testicle

✤ Muscle layer pulls closer to body in cold temperatures or when aroused

✤ Spermatic cord attaches to testicle & contains vas deferens, nerves, blood vessels, & muscle fibers

QuickTime™ and a decompressor

are needed to see this picture.

External Male Sexual Anatomy

The Testes

✤ Functions of testes

✤ Secretion of male sex hormones

✤ Production of sperm

✤ Cryptorchidism - undescended testes

✤ Affects 3-4% of infants & 30% of premature infants

✤ Prevents sperm production

✤ Increases chances of infertility, hernia, or testicular cancer

The Testes

✤ Seminiferous tubules - site of sperm production

✤ Interstitial cells - located between seminiferous tubules; major source of androgen

✤ Epididymis - responsible for maturation, storage, & selection of normal sperm

Other Internal Structures

✤ Vas deferens

✤ Moves sperm from scrotum to ejaculatory duct within prostate gland

✤ Ejaculatory ducts on each side open up into urethra

✤ Seminal vesicle

✤ Adjacent to end of each vas deferens

✤ Secretes 70% of seminal fluid

✤ Alkaline fluid nourishes or energizes sperm

Other Internal Structures

✤ Prostate gland

✤ Secretes about 30% of seminal fluid

✤ Fluid counteracts the acidity of the male urethra & female vagina

✤ Cowper’s gland

✤ Attaches to urethra below prostate

✤ Secretes mucousy substance before ejaculation that may contain active, healthy sperm

Semen

Semen - viscous fluid ejaculated through penis that contains sperm & fluids from the prostate, seminal vesicles, & Cowper’s glands

Internal Sexual Anatomy

Male Sexual Functions

✤ Erection - process whereby penis or clitoris engorges with blood & increases in size

✤ Psychogenic erections - from the mind

✤ Physiogenic erections - from the body

✤ In most cases, there is input from both the mind & the body.

✤ Erections do not always occur in response to sexual arousal.

Male Sexual Functions

✤ Ejaculation - process whereby semen is expelled from the body through the penis

✤ Emission phase - first stage of male orgasm in which seminal fluid is gathered in the urethral bulb

✤ Expulsion phase - the second stage of male orgasm during which the semen is expelled from the penis by muscular contractions

Male Sexual Functions

✤ Retrograde ejaculation - process by which semen is expelled into the bladder instead of out of the penis

✤ Not harmful

✤ May be caused prostate surgery, illness, congenital anomaly, & drugs such as tranquilizers

✤ Nocturnal emissions - involuntary ejaculation during sleep

Ejaculation

QuickTime™ and a decompressor

are needed to see this picture.

Next Week

✤ Topics

✤ Prenatal sexual development

✤ Sexual arousal & response

✤ Reading - Basson